Automatic ventilator screen



patente& May 9, 195

UNITED STATES i &507.171 A AUTOMATIC VENTILATOR seaman Cha les A: Martermi; ;Selin Substituted for ap lication Serial No. 318,-535?, February12, 1940. This prisnim-Menus, 1946, Serial No. 652,897 i Llai n. (c.160490 This application is a substitute for abandoned application SerialNumber 318,537, filed February 12, 1940.

My invention relates to a ventilator screen.

An object of my invention is to provide an automatic ventilator screenwhich normally is in fixed position when a window is raised.

A further object of my invention is to provide a ventilator screen whichcan be released from position as desired.

A further object of my invention is to provide a ventilator screen whichautomatically rolls up within a suitable container.

A further object of my invention is to provide an automatic ventilatorscreen which automatically engages in closed position when the window towhich it is attached is lowered.

A further object of my invention is to provide a ventilator screen whichis automatically controlled for desired positions and which can bemanufactured at a simple cost. i

With these and other objects in View, my invention consists in theConstruction, arrangement and combination of the various parts of mydevice, whereby the objects contemplated are attained, as hereinaftermore fully set forth pointed out in my claims, and illustrated in theaccompanying drawings, in which:

Figure 1 is a front elevation of a window using my type of screen,

Figure 2 is a sectional View taken along the medial line thereof,

Figure 3 is an enlarged sectional detail, and

Figure 4 is a further detail.

I have used the character IE! to designate the side members of astandard window having the top member Il and the bottom member l2. Thewindows l3 and 14 are attached in the usual manner to the top members |5and !6, the side members I'I and the bottom members a and !9. Attachedto the lower member [8 of the window l3 is the casing 19 which is formedwith an upwardly extending flange 20 to provide attachment by means ofthe screws 2| to such member.

A roller 22 is suitably journaled within the side members 23 of thecasing and the roller 22 includes a suitable torsional spring thereinwhich spring has the tendeney of maintaining a constant tension againstthe roller. Wound about the roller 22 is a fabric screen 24 which is ofa comparatively fine mesh.

The sash sides are guided between the vertical side strips 25, 26 and21. Attached at the lower end of the medial strip 26 are the springclips 28 which are attached at 29 thereto,

' ly bent portions 29a of the clips 28 are formed The outward- 66 withthe bevelled portion 30 which terminates in a lip 31. A pair of metalretaining members 32 are attached to the lower ends of the fabric screen24 at 33 and include outwardly extending portions 54 which merge intobent lips 35 which lips are adapted to be received under the bevelledportion 30 and adjacent the lip 3l (see Figures 3 and 4). Depending fromthe lower edge 36 (see Figure 4) of the fabric screen 24 is a furtherfolded fabric member 31 which includes a suitable bar 38 therein toprovide a comparatively tight closure when the screen 24 is in theclosed position.

A further stiffening member such as 39 is provided adjacent the loweredge 36 to provide rigidity across the screen. The member 39 is insertedwithin the fabric which is folded over the same and then stitched. Thedevice operates as follows:

Normally the lips 35 are engaged beneath the portions 30 of the members28. When the inner window !3 is raised the fabric screen 24 will beunrolled from the roller 22 under spring tension which will maintain thescreen in stretched condition. The window can be raised to any desiredheight and in this manner a draft-proof screen is provided whichprevents entrance of strong drafts and the like and yet allows forsuflicient circulation of air through the window opening.

If it is desired to raise the fabric screen 24 after the window has beenelevated all that is necessary is to pull down slightly on the loweredge 36 or the portion 31 which releases the lips 35 from under thebevelled portions 30 and the screen is allowed to fly upwardly withinthe casing IS. The members 34, however, will always be in verticalposition within the casing and if the window is then lowered, the lips35 will snap beneath the portions 30 of the spring members, 28 so thatby merely closing the window l3, the fabric screen will be retained atthe bottom end thereof and the window can then be raised again leavingthe fabric screen in place as shown in Figure 3.

This action occurs principally because the lips 35 will be wedgedbetween the outwardly bent portions 29a of the members 28 therebyspringing the portions 29a apart and then allowing the lips 35 to snapunder the bevelled portion as explained. This arrangement therebyprovides for an automatic control of the draft screen without thenecessity of pulling the same down and attaching and as explained allthat is necessary is to lower the window and then to raise the sameagain. A strip such as 40 can be attached to the portion I 6 of ,thewindow to provide a filler and other types of filling mediums can beemployed if such is desired.

It will now be seen that I have provided a ventilator screen which isplaced in fixed position automatically through one operation of awindow, which can be rolled up within a suitable container, whichautomatically engages in closed position, which provides a convenientventilator screen, which can' be used either in raised or closedposition for any season, and which can be manufactured at a reasonablecost.

Some changes may be made in the construction and arrangement of theparts of myinventon without departing from the real -spirit and purposeof my invention, and it is my intention to cover by my claim anymodifiedorms of structure or use of mechanical equivalents, which may bereasonably included within its scope.

I claim as my invention:

In a window frame provided with a sliding sash,

the combination of a screen roll attached to said sash. a pair of clipshaving resilient outwardly bent portions secured at opposite sides ofthe frame, said clips being provided with beveled lower edges, and thelower edge of the screen having a pair of lips with bent extremitiesattached thereto at opposite sides of the screen for automaticengagement with the clips when the sash is lowered.

CHARLES A. MORTEN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 611324 Monroe Oct. 4, 1898917.562 Dowd Apr. 6, 1909

